Question about Goodman GMS90703BXA Heater
This unit has had two new boards put into it, honeywell brand boards. The unit started running the combustion and circulating fans and not producing heat. Two technicians have worked on it and it is still sitting there with the combustion and circulating fans running. have even put in a new ignitor and flame sensor. the loops check out fine, it is not the tstat. Can anyone help with this problem. I paid for expert help but this site will not honor it, wasted that money.
Check near the squirrel cage fan and see if there is a sail switch. Sometimes these are used to confirm air movement prior to firing off the gas furnace. It is simply a square piece of metal on a stick that attaches to a microswitch. This switch is then depressed when the fan pushes the air (and the metal piece) allowing the burner to fire off.
Hope this helps.
Posted on Feb 04, 2009
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Posted on Jan 02, 2017
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